Safety-guard for foot or screw presses.



J. M. JONES.

SAFETY GUARD FOR FOOT 0R SCREW PRESSES.

APPLICATION FILED 11.4, 1012.

1,041,092. I Patented 001;. 15, 1912.

WITNESSES INVENTOR.

JAMES MELVIN JONES, 0F HAMILTON, ONTARIO, CANADA.

SAFETY-GUARD FOR FOOT 0R SCREW PRESSES.

Specification of Letters Patent.

Patented Oct. 15,1912.

Application filed April 4, 1912. Serial No. 688,425.

To all whom it may concern:

Be it known that I, Janus MELVIN Jones, a citizen of the Dominion ofCanada, residing at 150 Dundurn street, in the city of Hamilton, in thecounty of \Ventworth, in the Province of Ontario, Dominion of Canada,have invented a certain new and useful Safety-Guard for Foot or ScrewPresses, of

i which the following is a specification.

This invention relates to safety guards for foot or screw presses.

The object of the invention is to provide a device of this characterdirectly connected with and operated by the press plunger, said deviceserving to move or sweep the operators hands from a position of danger,prior to the time that the press plunger descends far enough to renderit likely to catch the hands of said operator.

This invention contemplates the employment of a structure in which theinitial movement of the guarding member is a very rapid one, thismovement gradually decreasing. It is aimed to provide in the presentstructure, a simple and economical arrangement of parts which will serveall of the purposes of more complicated structures heretofore employed.By virtue of the structure herein shown anddescribed, complicated andexpensive connections between the usual treadle and releasing clutch ofthe machine are eliminated, it being clearly apparent that it is onlynecessary to provide means for performing the guarding function prior tothe descent of the plunger, and that this may readily be done by thestructure herein described, and in which the guarding element isdirectly operated by said plunger.

Further objects and advantages of the invention will be set forth in thedetailed description which now follows.

In the accompanying drawing, Figure 1, is a front elevation of a press,having the invention applied thereto, and Fig. 2, is a side elevation ofthe elements comprising the said invent-ion.

Like numerals designate corresponding parts in all of the figures of thedrawing.

Referring to the drawing, the numeral 5, designates a press frame and 6,the press plunger. To the press plunger is secured a bracket 7, by meansof cap screws or like fastening devices indicated at 8. Bracket 7,carries a laterally extending pin or stud 9, and to this stud a coupling10, is fixed. This coupling is hingedly connected at 11, to one end of alink 12, and the opposite end of this link is pivoted at 13, to a block14. Block 1 1, is adjustably held by means of a screw 1.5, upon theupper end of a bent lever 16. This bent lever is adjustable through ablock 17, and is held in any adjusted position within said block bymeans of a set screw 18. The block 17, is pivoted at 19 to a bracket 20,said bracket being preferably secured by bolts or other fasteningdevices to the side of the press frame 5. A set screw 21, adj ustablymounts an arm 22, upon the lower end of the bent lever 16, and the arm22, carries a gate or guard 23.

The operation of the device is as follows:

Upon downward movement of the plunger, and bracket 7, the connectionsdescribed, will force the upper portion of bent lever 16, to the rightin Fig. 2, and since block 17 at this time rocks upon its pivot 19, itfollows that the lower portion of the bent lever 16, will be swungtoward the left in Fig. 2. At

this time, gate 23, sweeps across the work table of the press and sweepsthe operators hands away from the position of danger. It is apparentthat the structure described will impart a quick initial movement to thegate, which movement will gradually decrease in rapidity as the link 12,comes toward a position of horizontal alinement. The various adjustmentsprovided for permit any desired throw to be given to the parts toachieve the best result.

WVhile the elements shown and described are well adapted to serve thepurposes for which they are intended it is to be understood that theinvention is not limited to the precise construction set forth, butincludes within its purview, such changes as may be made within thescope of the appended claims.

Having thus described my device and its advantages, what I claim asnovel and desire to secure by Letters Patent, is

1. In a device of the character described, the combination with a pressand its plunger, of a guard element, a swinging lever by which saidguard element is carried, and a pivoted link connection between saidplunger and said swinging lever, said guard element being carried by thelower end of said lever and said swinging link connection engaging saidlever above the point upon which it swings.

2. In a device of the character described,

the combination with a press and its p1unger, of a bracket secured tothe press frame, a bearing block pivotally mounted upon said bracket, alever mounted in said bearing clock, a guard element carried by saidlever and a pivoted link connection between said lever and said plunger.

3. In a device of the character described, the combination with a pressand its plunger, of a bracket secured to the press frame, a bearingpivotally mounted upon said bracket, a lever mounted in said bearingblock, a guard element carried by said lever, a pivoted link connectionbetween said lever and said plunger, and means for adjusting thepoint ofengagement of said link connection with said lever.

i. In a device of the character described, the combination with a pressand its plunger, of a swingingly mounted bent lever, a

guard element supported from the lower end of said bent lever, and apivoted link connecti on between the upper end of said lever and saidplunger.

5. In a device of the character described, the combination With a pressand its plunger, of a bracket secured to the press frame, a blockpivoted to said bracket, a bent lever adjustable through said block, aguard carrying element adjustable upon said lever, a.

bracket secured to the press plunger, a second block adjustably mountedupon said lever and a link connection between the last named block andsaid bracket.

Signed at Hamilton, Ontario, Canada, this 26th day of March, 1912.

JAMES MELVIN JONES. In the presence of E. E. J ONES, ALFRED T. BRATTON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). 0.

